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Max Raas

@maxraas.bsky.social
251 followers 743 following 32 posts

PhD Candidate at Utrecht University & Hubrecht Institute | Evolutionary Cell Biology | Chromosome Segregation

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Reposted by Max Raas
Chung Hyun Cho @chc-evobio.bsky.social · 04/07/2026
Excited to share our new preprint led by Fred and me in collaboration with the archaeal community! We found that the molecular foundation of histone-based chromatin has pre-eukaryotic roots in Asgard archaea. (1/4) #ArchaeaSky www.biorxiv.org/content/10.6...
biorxiv.org
Emergence of histone-based chromatin complexity in Asgard archaea
The emergence of the eukaryotes coincided with the diversification of histone proteins and their post-translational modifications by enzymes that constitute the core of eukaryotic chromatin. Yet the e...
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Daniel Tamarit @danieltamarit.bsky.social · 22/05/2026
I'm looking for an enthusiastic student to join my team as a PhD candidate on archaeal genome evolution 🦠💻 Work in beautiful Utrecht, at @binfutrecht.bsky.social, an international group full of caring, amazing scientists, and with frequent cake breaks! www.uu.nl/en/organisat... Please share! 🙏
uu.nl
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Nature Astronomy @natastron.nature.com · 16/03/2026
Samples returned from the asteroid Ryugu contain all five canonical nucleobases (A, G, C, T, U). Their presence in Ryugu and Bennu supports the hypothesis that carbonaceous asteroids contributed to the prebiotic chemical inventory of early Earth. dlvr.it/TRWtVp ☄️
dlvr.it
A complete set of canonical nucleobases in the carbonaceous asteroid (162173) Ryugu - Nature Astronomy
Samples returned from the asteroid Ryugu contain all five canonical nucleobases (A, G, C, T and U). Their presence in Ryugu and Bennu supports the hypothesis that carbonaceous asteroids contributed to the prebiotic chemical inventory of early Earth.
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Thijs J. G. Ettema 🦠🔬🇳🇱🇸🇪🇪🇺 @ettema.bsky.social · 05/03/2026
Finally out in @natmicrobiol.nature.com: Prediction of eukaryotic cellular complexity in Asgard archaea using structural modelling. Great work by @stephkoe.bsky.social @kassipan.bsky.social @jvhooff.bsky.social www.nature.com/articles/s41...
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Thibaut Brunet @thibautbrunet.bsky.social · 28/02/2026
Final version @nature.com of our paper describing unconventional multicellular development in a choanoflagellate inhabiting an extreme environment. A ton of new data since the first @biorxivpreprint.bsky.social preprint (which we've kept updating). A brief 🧵 (carried over from the old place)
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Eelco Tromer @eelcotromer.bsky.social · 26/02/2026
We're on a roll here. Check out this cool paper by @scienceleah.bsky.social et al. on not one, but two types of sperm (!) in the silk worm Bombyx mori. Happy to have contributed. #meiosis4ever
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Eelco Tromer @eelcotromer.bsky.social · 26/02/2026
Now in Nature Comms w/ @ritatewari.bsky.social, Pushkar Sharma & @ryanase.bsky.social (thanks!). Aurora kinases fascinate me: single ancestor - parallel duplications in eukaryotes - paralogs with distinct functions. ARK1 is the CPC Aurora in the malaria parasite. rdcu.be/e5NRT #plasmodium #mitosis
rdcu.be
Plasmodium ARK1 regulates spindle formation during atypical mitosis and forms a divergent chromosomal passenger complex
Nature Communications - This study reveals that the malaria parasite Plasmodium uses a unique Aurora kinase complex to control cell division. This divergent machinery regulates spindle formation...
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Kops Lab @kopslab.bsky.social · 23/02/2026
As a cell biology lab, we acknowledge the decades-long impressive efforts to uncover evolutionary relationships using advanced phylogenomics methods. These approaches undergo continuous improvements that lead to adjustments of data interpretation, as is the case in every scientific field. (1/3)
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Andrew Roger @andrewjroger.bsky.social · 16/02/2026
The 'devil is in the details'. You have to look beyond author claims and try to understand why the various studies have come to different conclusions and read the explanations given by the authors themselves.
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Max Raas @maxraas.bsky.social · 13/02/2026
Recently, a Hypothesis was posed in @jcellsci.bsky.social in which the root of eukaryotes was placed between kinetoplastids and all other eukaryotes. From this, it was implied that LECA did not have a kinetochore. We argue this is highly unlikely. A 🧵(1/12) Read our reply here: tinyurl.com/n87myhpr
tinyurl.com
The LECA had a conventional kinetochore and the kinetoplastid kinetochore is a derived feature – a critical evaluation of Akiyoshi, 2025
Summary:Akiyoshi, 2025 presented a hypothesis with implications for the early evolution of eukaryotes and eukaryotic cell division machinery. In this Correspondence, the authors conclude that this hyp...
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Max Raas @maxraas.bsky.social · 01/12/2025
Our story on the kinetochore composition of the ciliate Tetrahymena thermophila is out now on bioRxiv! We find surprisingly many orthologs of conventional kinetochore components, but also components that have very different evolutionary origins. A 🧵 (1/11) Check it out here: tinyurl.com/4ectm9x4
tinyurl.com
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Eelco Tromer @eelcotromer.bsky.social · 23/06/2025
Happy to see our work published and glad to have contributed together with @maxraas.bsky.social ! Looking forward to all the projects that will come out of this work!
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Laura Eme @lauraeme.bsky.social · 22/06/2025
Excited to share our new paper in @cellreports.bsky.social that reshapes our understanding of chromosome organization's deep evolutionary roots! Our work dives into the origins of the machinery that structures our very genomes. 🔗: doi.org/10.1016/j.ce... #Genomics #Evolution #CellBiology #LECA
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Cell Reports @cp-cellreports.bsky.social · 07/03/2025
PRC1 and PRC2 proximal interactome in mouse embryonic stem cells
dlvr.it
PRC1 and PRC2 proximal interactome in mouse embryonic stem cells
Zijlmans and Stelloo et al. profiled in vivo proximal interactomes of PRC1 and PRC2 in mouse embryonic stem cells, identifying >100 proteins, including transcription factors and RNA-binding proteins. Their findings reveal shared and distinct roles of…
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Journal of Cell Science @jcellsci.bsky.social · 09/01/2025
Ana Almeida, Helder Rocha, Maximilian Raas, Geert Kops, Reto Gassmann, Helder Maiato @i3suporto.bsky.social, et al. dissect the relationship between kinetochore size & CENP-E dependence for chromosome alignment. journals.biologists.com/jcs/article/... journals.biologists.com/jcs/article/...

Phylogenetic profile of CENP-E across holocentric and monocentric taxa. (A–D) CENP-E conservation in (A) the phylum Nematoda, (B) the phylum Vertebrata, (C) the insect order Hemiptera and (D) the insect order Diptera. Lineages with an inferred CENP-E loss are highlighted with a coloured box. Holocentric lineages are indicated with ‘H’ and monocentric lineages with ‘M’, as well as with a graphic depiction of holocentric and monocentric chromosomes.
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bioRxiv Cell Biology @biorxiv-cellbio.bsky.social · 07/08/2024
On the possibility of yet a third kinetochore system in the protist phylum Euglenozoa www.biorxiv.org/content/10.1101/202…
biorxiv.org
On the possibility of yet a third kinetochore system in the protist phylum Euglenozoa https://www.biorxiv.org/content/10.1101/2024.08.06.606595v1
Transmission of genetic material from one generation to the next is a fundamental feature of all liv
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Jolien van Hooff @jvhooff.bsky.social · 09/01/2024
Online: our evolutionary interrogation of eukaryotic Structural Maintenance of Chromosomes (SMC) complexes @maxraas.bsky.social @eelcotromer.bsky.social @lauraeme.bsky.social #SMCcomplexes #eukaryogenesis #LECA #condensin #cohesin #evolutionarycellbiology #chromatin 🧵(1/6) doi.org/10.1101/2024...
doi.org
Shaping up genomes: Prokaryotic roots and eukaryotic diversification of SMC complexes
bioRxiv - the preprint server for biology, operated by Cold Spring Harbor Laboratory, a research and educational institution
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Bastiaan @bastiaandepotter.bsky.social · 10/11/2023
My second paper of the year finally out! While the Polycomb field is dominated by models based on a tight functional coupling between PRC1 and PRC2, we found compelling evolutionary support for the predominantly independent functions of PRC1 and PRC2. www.nature.com/articles/s42...
nature.com
Uncoupled evolution of the Polycomb system and deep origin of non-canonical PRC1 - Communications Bi...
A systematic characterization of the Polycomb system throughout the eukaryotic tree of life reveals that evolution of PRC1 and PRC2 has been largely uncoupled.
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